Marking Scheme link is given at every page.
CBSE EXAM 2026 30 Sets
Class : 10th
Sub : Science
How to see answers or marking scheme ?
Click above on Every page
If you are unable to click, please open this file using a PDF viewer in Google Drive.
Disclaimer: These papers are based on the SQP released by CBSE and
published by a private organization just for the practice of the students.
CBSE has not released these papers and CBSE is not related to these papers
in any manner. Publisher of these papers clearly state that these paeprs
are only for practice of students and questions may not be come in main
exam.
,NODIA APP Sample Paper 01 Page 1
Sample Paper 01
Class X 2025-26
Science (086)
Time: 3 Hours Max. Marks: 80
General Instructions:
1. This question paper consists of 39 questions in 3 sections. Section A is Biology, Section B is Chemistry
and Section C is Physics.
2. All questions are compulsory. However, an internal choice is provided in some-questions. A student is
expected to attempt only one of these questions.
SECTION-A
1. Which of the following represents the correct sequence of events in the nutrition of Amoeba?
(a) Digestion ® Ingestion ® Absorption ® Assimilation ® Egestion
(b) Ingestion ® Digestion ® Absorption ® Assimilation ® Egestion
(c) Egestion ® Ingestion ® Digestion ® Absorption ® Assimilation
(d) Ingestion ® Assimilation ® Digestion ® Absorption ® Egestion
2. The nerve impulse is the signal transmitted along a nerve fibre. What is the correct pathway for the flow of
this impulse within a single neuron?
(a) Axon terminal ® Cell body ® Dendrite
(b) Cell body ® Axon ® Dendrite
(c) Dendrite ® Cell body ® Axon terminal
(d) Axon terminal ® Dendrite ® Cell body
3. There are various methods to prevent pregnancy. Which of the following contraceptive methods also provides
protection from acquiring sexually transmitted diseases (STDs)?
(a) Copper-T (b) Oral Pills
(c) Condom (d) Tubectomy
4. In a classic Mendelian monohybrid cross, when a heterozygous tall pea plant (Tt) from the F1 generation is
self-pollinated, what is the resulting phenotypic ratio of tall to dwarf plants in the F2 generation?
(a) 1:1 (b) 1:2
(c) 3:1 (d) 2:1
5. In any ecosystem, certain organisms are responsible for breaking down complex organic substances from
dead plants and animals into simpler inorganic substances. What are these essential organisms called?
(a) Producers (b) Primary Consumers
(c) Carnivores (d) Decomposers
6. Consider the following statements about the human heart:
(i) The human heart is a four-chambered organ.
(ii) The right ventricle pumps oxygenated blood to the lungs.
(iii) The wall of the left ventricle is thicker than the wall of the right ventricle.
(iv) Valves ensure that blood flows in only one direction through the heart.
,Page 2 Sample Paper 01 CBSE Science Class 10
Which of the above statements are correct?
(a) (i), (iii), and (iv) (b) (i) and (ii) only
(c) (ii) and (iv) only (d) All are correct.
7. Fertilization in flowering plants is the fusion of male and female gametes. Where does this process typically
take place?
(a) On the surface of the stigma.
(b) Inside the growing pollen tube.
(c) Within the anther of the stamen.
(d) Inside the ovule, which is located within the ovary.
8. Assertion (A) : Abscisic acid is referred to as a “stress hormone” in plants.
Reason (R) : The production of abscisic acid in plants stimulates the closure of stomata, which helps to
reduce water loss during dry conditions.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, and R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
9. Assertion(A) : All variations that arise in a species have an equal chance of survival.
Reason (R) : Natural selection favors variations that provide a survival advantage in a particular environment.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, and R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
10. While plants generate oxygen during the day, they produce carbon dioxide at night. Justify this statement.
11. Student to attempt either option A or B.
A. How is the process of breathing different in aquatic organisms compared to terrestrial organisms?
Explain why the rate of breathing in aquatic organisms is much faster.
O
B. What is translocation in plants? Name the tissue responsible for it and the form in which the food is
transported.
12. In a grassland ecosystem, the following organisms are present:
Grass, Grasshopper, Hawk, Lizard, and Snake. Construct two distinct food chains from this ecosystem, each
starting with the producer.
13. Draw a neat diagram of a reflex arc showing the pathway of a reflex action when a person accidentally
touches a hot object. Label the key components involved.
14. In pea plants, a pure tall plant (TT) is crossed with a pure short plant (tt).
(i) What is the phenotype and genotype of the F1 generation?
(ii) If the F1 plants are self-pollinated, what will be the ratio of pure tall, hybrid tall, and dwarf plants
obtained in the F2 generation? Show the cross.
15. A student had a meal containing rice and lentils (dal). Refer to the figure of the human alimentary canal
to the following questions.
, NODIA APP Sample Paper 01 Page 3
Human Alimentary canal
Attempt either subpart A or B.
A. Name the component in rice that is the primary source of energy. Where does its digestion begin and
which enzyme is responsible?
O
B. Lentils are a rich source of protein. Describe the process of protein digestion that occurs in the stomach
(Part N) and the small intestine (Part O).
C. How is the small intestine (Part O) designed to maximize the absorption of digested food?
16. Attempt either option A or B
A. (i) A student observed a slice of bread with a cottony growth after leaving it in a moist, dark place.
Identify the organism and its mode of reproduction.
(ii) Explain how this mode of reproduction helps the organism to survive unfavourable conditions.
(iii) State one key advantage of sexual reproduction over this method.
O
B. (i) Draw a labelled diagram of the longitudinal section of a flower.
(ii) List any three changes that take place in a flower after fertilization which lead to the formation of
fruit and seed.
(iii) What is the function of the sepals and petals in a flower?
SECTION-B
17. Which of the following equations represent redox reactions and what are the values for ‘p’ and ‘q’ in these
equations?
Sunlight
Equation 1 : pAgCl (s) 2Ag (s) + Cl 2 (g)
Equation 2 : Zn (s) + qHCl (aq) " ZnCl 2 (aq) + H 2 (g)
(a) Only equation 1 is a redox reaction, p = 1 and q = 2
(b) Only equation 2 is a redox reaction, p = 2 and q = 1
(c) Both equations 1 and 2 are redox reactions, p = 2 and q = 2
(d) Neither equation is a redox reaction, p = 1 and q = 1
18. Four statements about the reactions of oxides are listed.
I. Lead(II) oxide reacts with both dilute hydrochloric acid and aqueous sodium hydroxide.
II. Magnesium oxide reacts with dilute hydrochloric acid but does not react with aqueous sodium hydroxide.
III. Copper(II) oxide reacts with both dilute hydrochloric acid and aqueous sodium hydroxide.
IV. Sodium oxide reacts with aqueous sodium hydroxide but not with dilute hydrochloric acid.
Which statements are correct?
(a) I and III (b) I and II
(c) II and IV (d) III and IV
CBSE EXAM 2026 30 Sets
Class : 10th
Sub : Science
How to see answers or marking scheme ?
Click above on Every page
If you are unable to click, please open this file using a PDF viewer in Google Drive.
Disclaimer: These papers are based on the SQP released by CBSE and
published by a private organization just for the practice of the students.
CBSE has not released these papers and CBSE is not related to these papers
in any manner. Publisher of these papers clearly state that these paeprs
are only for practice of students and questions may not be come in main
exam.
,NODIA APP Sample Paper 01 Page 1
Sample Paper 01
Class X 2025-26
Science (086)
Time: 3 Hours Max. Marks: 80
General Instructions:
1. This question paper consists of 39 questions in 3 sections. Section A is Biology, Section B is Chemistry
and Section C is Physics.
2. All questions are compulsory. However, an internal choice is provided in some-questions. A student is
expected to attempt only one of these questions.
SECTION-A
1. Which of the following represents the correct sequence of events in the nutrition of Amoeba?
(a) Digestion ® Ingestion ® Absorption ® Assimilation ® Egestion
(b) Ingestion ® Digestion ® Absorption ® Assimilation ® Egestion
(c) Egestion ® Ingestion ® Digestion ® Absorption ® Assimilation
(d) Ingestion ® Assimilation ® Digestion ® Absorption ® Egestion
2. The nerve impulse is the signal transmitted along a nerve fibre. What is the correct pathway for the flow of
this impulse within a single neuron?
(a) Axon terminal ® Cell body ® Dendrite
(b) Cell body ® Axon ® Dendrite
(c) Dendrite ® Cell body ® Axon terminal
(d) Axon terminal ® Dendrite ® Cell body
3. There are various methods to prevent pregnancy. Which of the following contraceptive methods also provides
protection from acquiring sexually transmitted diseases (STDs)?
(a) Copper-T (b) Oral Pills
(c) Condom (d) Tubectomy
4. In a classic Mendelian monohybrid cross, when a heterozygous tall pea plant (Tt) from the F1 generation is
self-pollinated, what is the resulting phenotypic ratio of tall to dwarf plants in the F2 generation?
(a) 1:1 (b) 1:2
(c) 3:1 (d) 2:1
5. In any ecosystem, certain organisms are responsible for breaking down complex organic substances from
dead plants and animals into simpler inorganic substances. What are these essential organisms called?
(a) Producers (b) Primary Consumers
(c) Carnivores (d) Decomposers
6. Consider the following statements about the human heart:
(i) The human heart is a four-chambered organ.
(ii) The right ventricle pumps oxygenated blood to the lungs.
(iii) The wall of the left ventricle is thicker than the wall of the right ventricle.
(iv) Valves ensure that blood flows in only one direction through the heart.
,Page 2 Sample Paper 01 CBSE Science Class 10
Which of the above statements are correct?
(a) (i), (iii), and (iv) (b) (i) and (ii) only
(c) (ii) and (iv) only (d) All are correct.
7. Fertilization in flowering plants is the fusion of male and female gametes. Where does this process typically
take place?
(a) On the surface of the stigma.
(b) Inside the growing pollen tube.
(c) Within the anther of the stamen.
(d) Inside the ovule, which is located within the ovary.
8. Assertion (A) : Abscisic acid is referred to as a “stress hormone” in plants.
Reason (R) : The production of abscisic acid in plants stimulates the closure of stomata, which helps to
reduce water loss during dry conditions.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, and R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
9. Assertion(A) : All variations that arise in a species have an equal chance of survival.
Reason (R) : Natural selection favors variations that provide a survival advantage in a particular environment.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, and R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
10. While plants generate oxygen during the day, they produce carbon dioxide at night. Justify this statement.
11. Student to attempt either option A or B.
A. How is the process of breathing different in aquatic organisms compared to terrestrial organisms?
Explain why the rate of breathing in aquatic organisms is much faster.
O
B. What is translocation in plants? Name the tissue responsible for it and the form in which the food is
transported.
12. In a grassland ecosystem, the following organisms are present:
Grass, Grasshopper, Hawk, Lizard, and Snake. Construct two distinct food chains from this ecosystem, each
starting with the producer.
13. Draw a neat diagram of a reflex arc showing the pathway of a reflex action when a person accidentally
touches a hot object. Label the key components involved.
14. In pea plants, a pure tall plant (TT) is crossed with a pure short plant (tt).
(i) What is the phenotype and genotype of the F1 generation?
(ii) If the F1 plants are self-pollinated, what will be the ratio of pure tall, hybrid tall, and dwarf plants
obtained in the F2 generation? Show the cross.
15. A student had a meal containing rice and lentils (dal). Refer to the figure of the human alimentary canal
to the following questions.
, NODIA APP Sample Paper 01 Page 3
Human Alimentary canal
Attempt either subpart A or B.
A. Name the component in rice that is the primary source of energy. Where does its digestion begin and
which enzyme is responsible?
O
B. Lentils are a rich source of protein. Describe the process of protein digestion that occurs in the stomach
(Part N) and the small intestine (Part O).
C. How is the small intestine (Part O) designed to maximize the absorption of digested food?
16. Attempt either option A or B
A. (i) A student observed a slice of bread with a cottony growth after leaving it in a moist, dark place.
Identify the organism and its mode of reproduction.
(ii) Explain how this mode of reproduction helps the organism to survive unfavourable conditions.
(iii) State one key advantage of sexual reproduction over this method.
O
B. (i) Draw a labelled diagram of the longitudinal section of a flower.
(ii) List any three changes that take place in a flower after fertilization which lead to the formation of
fruit and seed.
(iii) What is the function of the sepals and petals in a flower?
SECTION-B
17. Which of the following equations represent redox reactions and what are the values for ‘p’ and ‘q’ in these
equations?
Sunlight
Equation 1 : pAgCl (s) 2Ag (s) + Cl 2 (g)
Equation 2 : Zn (s) + qHCl (aq) " ZnCl 2 (aq) + H 2 (g)
(a) Only equation 1 is a redox reaction, p = 1 and q = 2
(b) Only equation 2 is a redox reaction, p = 2 and q = 1
(c) Both equations 1 and 2 are redox reactions, p = 2 and q = 2
(d) Neither equation is a redox reaction, p = 1 and q = 1
18. Four statements about the reactions of oxides are listed.
I. Lead(II) oxide reacts with both dilute hydrochloric acid and aqueous sodium hydroxide.
II. Magnesium oxide reacts with dilute hydrochloric acid but does not react with aqueous sodium hydroxide.
III. Copper(II) oxide reacts with both dilute hydrochloric acid and aqueous sodium hydroxide.
IV. Sodium oxide reacts with aqueous sodium hydroxide but not with dilute hydrochloric acid.
Which statements are correct?
(a) I and III (b) I and II
(c) II and IV (d) III and IV
